Fan Motor System Abnormality / Fan Lock - Daikin CTXU25G2V1B Service Manual

SiBE12-908
2.35 Fan Motor System Abnormality
P9
Remote
Controller Display
Outdoor Unit LED A5
Display
Method of During humidification fan motor running, fan motor system abnormality is identified based on the
fan speed (rpm) detected by Hall IC.
Malfunction
Detection
Malfunction <Humidification fan>
When fan speed does not reach 100 rpm within 12 sec. after fan motor start up.
Decision
Conditions
Supposed <Humidification fan>
Causes
Troubleshooting
Check No.23
Refer to P.170
Service Diagnosis
55
Defective motor (Hall IC) for humidification fan
Breakage of relay harness or loose connector
Detection fault of fan speed due to defective outdoor unit PCB
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is humidification
fan harness S72
connected?
YES
Rotate fan by hand
after removing it
Does it rotate smoothly?
YES
After assembling, run the fan
Does it rotate?
YES
Stop
<Others>
<Humidification fan>
Run the humidifying operation.
Check No.23
Check for the rotation pulse
input of outdoor unit PCB
/ Fan Lock
NO
NO
<Humidification fan>
NO
Is fuse for power
supply of fan(FU2)
blown?
NO
Troubleshooting
Reconnect properly.
Replace hymidifying fan
assembly.
YES
Replace outdoor fan,
humidification fan, outdoor
unit PCB.
Replace outdoor unit PCB.
Procedure complete.
(R9455)
155